I have created a minimum example to demonstrate an issue with observing SwiftData model and UndoManager. This project includes a simple NavigationSplitView, an Item SwiftData model that is being persisted and an enabled UndoManager. Problem: The SwiftData model Item can be observed as expected. Changing the date in the DetailView works as expected and all related views (ListElementView + DetailView) are updated as expected. When pressing ⌘+Z to undo with the enabled UndoManager, deletions or inserts in the sidebar are visible immediately (and properly observed by ContentView). However, when changing the timestamp and pressing ⌘+Z to undo that change, it is not properly observed and immediately updated in the related views (ListElementView + DetailView). Further comments: Undo operation to the model value changes (here: timestamp) are visible in the DetailView when changing sidebar selections Undo operation to the model value changes (here: timestamp) are visible in the ListElementView when restarting the app Undo operation to the model value changes (here: timestamp) are are properly observed and immediately visible in the sidebar, when ommiting the ListElementView (no view encapsulation) Relevant code base: struct ContentView: View { @Environment(\.modelContext) private var modelContext @Query private var items: [Item] @State private var selectedItems: Set<Item> = [] var body: some View { NavigationSplitView { List(selection: $selectedItems) { ForEach(items) { item in ListElementView(item: item) .tag(item) } .onDelete(perform: deleteItems) } .navigationSplitViewColumnWidth(min: 180, ideal: 200) .toolbar { ToolbarItem { Button(action: addItem) { Label("Add Item", systemImage: "plus") } } } } detail: { if let item = selectedItems.first { DetailView(item: item) } else { Text("Select an item") } } .onDeleteCommand { deleteSelectedItems() } } private func addItem() { withAnimation { let newItem = Item(timestamp: Date()) modelContext.insert(newItem) } } private func deleteItems(offsets: IndexSet) { withAnimation { for index in offsets { modelContext.delete(items[index]) } } } private func deleteSelectedItems() { for selectedItem in selectedItems { modelContext.delete(selectedItem) selectedItems.remove(selectedItem) } } } struct ListElementView: View { @Bindable var item: Item var body: some View { Text("Item at \(item.timestamp, format: Date.FormatStyle(date: .numeric, time: .standard))") } } struct DetailView: View { @Bindable var item: Item var body: some View { Text(item.timestamp, format: Date.FormatStyle(date: .numeric, time: .standard)) DatePicker(selection: $item.timestamp, label: { Text("Change Date:") }) } } @Model final class Item { var timestamp: Date init(timestamp: Date) { self.timestamp = timestamp } } It seems that the UndoManager does not trigger a redraw of the ContentView through the items query? Is this a bug or a feature?

Hello :) As title, I have used RCP with reference objects to capture items in real world. My next step is to detect how close the user finger is that object. I had tried to get the entity's relative position to root but found the position, somehow, is always the same regardless of how and where I move around the camera or the object. The entity has a child transform with a collision component, which is used to detect collision when the finger is closed enough to calculate the distance, but it fails as well... Any help will be appreciated, ty

Dear community, I am a new developer and I am building a view (called Root) that has a list of rows where clicking each row navigates to a completely different view. I have a CaseIteratable enum and I list each enum type using ForEach and each enum case navigates to a different view using NavigationLink and NavigationDestination. But the problem is that clicking any of the rows for the first time navigates correctly to the corresponding view. But when I go back to the root view and chose another row, it navigates me to a blank view for less than a sec and automatically navigates back to the root view. Below is the code for reference. I would really appreciate some help and advice here. Thank you very much! struct RootViewNavigationStack: View { @AppStorage("items") private var items = Item.allCases @State private var enableMove = false @State private var rootStackPath: NavigationPath = .init() var body: some View { NavigationStack(path: $rootStackPath) { VStack { List { ForEach(items) { item in HStack { NavigationLink(value: item) { ListCell( icon: item.icon, title: item.title) } .disabled(enableMove) if enableMove { withAnimation { Image(systemName: "line.3.horizontal") .foregroundStyle(.secondary) } } } } .onMove(perform: enableMove == true ? moveItems : nil) } } .toolbar { ToolbarItem(placement: .navigationBarTrailing) { Button { enableMove.toggle() } label: { if enableMove { Text("Done") .bold() } else { Text("Edit") } } } } .navigationDestination(for: Item.self) { item in item.destinationView } .navigationTitle("Root") } } } and this is the Item enum for more info Just kindly ignore the var iconName since it doesnt represent any actual SF Symbol name enum Item: Identifiable, Codable, Hashable, CaseIterable { case view1 case view2 case view3 case view4 case view5 var id: Item { self } } extension Item { var title: String { switch self { case .view1: "View1" case .view2: "View2" case .view3: "View3" case .view4: "View4" case .view5: "View5" } } var iconName: String { switch self { case .view1: "View1" case .view2: "View2" case .view3: "View3" case .view4: "View4" case .view5: "View5" } } var icon: Image { Image(systemName: self.iconName) } @ViewBuilder var destinationView: some View { switch self { case .view1: CarView() case .view2: HouseView() case .view3: MusicView() case .view4: ShoesView() case .view5: BooksView() } } } Once again, would really appreciate someone to help and many thanks 🙏!

Hello, I have a SwiftUI view with the following state variable: @State private var startDate: Date = Date() @State private var endDate: Date = Date() @State private var client: Client? = nil @State private var project: Project? = nil @State private var service: Service? = nil @State private var billable: Bool = false Client, Project, and Service are all SwiftData models. I have some view content that binds to these values, including Pickers for the client/project/service and a DatePicker for the Dates. I have an onAppear listener: .onAppear { switch state.mode { case .editing(let tt): Task { await MainActor.run { startDate = tt.startDate endDate = tt.endDate client = tt.client project = tt.project service = tt.service billable = tt.billable } } default: return } } This works as expected. However, if I remove the Task & MainActor.run, the values do not fully update. The DatePickers show the current date, the Pickers show a new value but tapping on them shows a nil default value. What is also extremely strange is that if tt.billable is true, then the view does update as expected. I am using Xcode 15.4 on iOS simulator 17.5. Any help would be appreciated.

I have a menu bar extra app that includes a sub-menu for lesser used functions. The sub menu implements .keyboardShortcut for a few of the menu items. When the app is first the active app, the keyboard shortcuts only produce a beep UNTIL the sub menu has been accessed. Once the sub-menu has loaded, the keyboard shortcuts work as expected. I should note that the MenuBarExtra is using the .window display mode, if that's important. The submenu appears with a button press within the MenuBarExtra. Is there a method to expose the keyboard shortcuts to the system before the view has loaded?

Hi y'all, After getting mono recording working, I want to differentiate my app from the standard voice memos to allow for stereo recording. I followed this tutorial (https://developer.apple.com/documentation/avfaudio/capturing_stereo_audio_from_built-in_microphones) to get my voice recorder to record stereo audio. However, when I look at the waveform in Audacity, both channels are the same. If I look at the file info after sharing it, it says the file is in stereo. I don't exactly know what's going on here. What I suspect is happening is that the recorder is only using one microphone. Here is the relevant part of my recorder: // MARK: - Initialization override init() { super.init() do { try configureAudioSession() try enableBuiltInMicrophone() try setupAudioRecorder() } catch { // If any errors occur during initialization, // terminate the app with a fatalError. fatalError("Error: \(error)") } } // MARK: - Audio Session and Recorder Configuration private func enableBuiltInMicrophone() throws { let audioSession = AVAudioSession.sharedInstance() let availableInputs = audioSession.availableInputs guard let builtInMicInput = availableInputs?.first(where: { $0.portType == .builtInMic }) else { throw Errors.NoBuiltInMic } do { try audioSession.setPreferredInput(builtInMicInput) } catch { throw Errors.UnableToSetBuiltInMicrophone } } private func configureAudioSession() throws { let audioSession = AVAudioSession.sharedInstance() do { try audioSession.setCategory(.record, mode: .default, options: [.allowBluetooth]) try audioSession.setActive(true) } catch { throw Errors.FailedToInitSessionError } } private func setupAudioRecorder() throws { let date = Date() let dateFormatter = DateFormatter() dateFormatter.locale = Locale(identifier: "en_US_POSIX") dateFormatter.dateFormat = "yyyy-MM-dd, HH:mm:ss" let timestamp = dateFormatter.string(from: date) self.recording = Recording(name: timestamp) guard let fileURL = recording?.returnURL() else { fatalError("Failed to create file URL") } self.currentURL = fileURL print("Recording URL: \(fileURL)") do { let audioSettings: [String: Any] = [ AVFormatIDKey: Int(kAudioFormatMPEG4AAC), AVLinearPCMIsNonInterleaved: false, AVSampleRateKey: 44_100.0, AVNumberOfChannelsKey: isStereoSupported ? 2 : 1, AVLinearPCMBitDepthKey: 16, AVEncoderAudioQualityKey: AVAudioQuality.max.rawValue ] audioRecorder = try AVAudioRecorder(url: fileURL, settings: audioSettings) } catch { throw Errors.UnableToCreateAudioRecorder } audioRecorder.delegate = self audioRecorder.prepareToRecord() } //MARK: update orientation public func updateOrientation(withDataSourceOrientation orientation: AVAudioSession.Orientation = .front, interfaceOrientation: UIInterfaceOrientation) async throws { let session = AVAudioSession.sharedInstance() guard let preferredInput = session.preferredInput, let dataSources = preferredInput.dataSources, let newDataSource = dataSources.first(where: { $0.orientation == orientation }), let supportedPolarPatterns = newDataSource.supportedPolarPatterns else { return } isStereoSupported = supportedPolarPatterns.contains(.stereo) if isStereoSupported { try newDataSource.setPreferredPolarPattern(.stereo) } try preferredInput.setPreferredDataSource(newDataSource) try session.setPreferredInputOrientation(interfaceOrientation.inputOrientation) } Here is the relevant part of my SwiftUI view: RecordView() .onAppear {             Task {                 if await AVAudioApplication.requestRecordPermission() {                     // The user grants access. Present recording interface.                     print("Permission granted")                 } else {                     // The user denies access. Present a message that indicates                     // that they can change their permission settings in the                     // Privacy & Security section of the Settings app.                     model.showAlert.toggle()                 }                 try await recorder.updateOrientation(interfaceOrientation: deviceOrientation)             }         }         .onReceive(NotificationCenter.default.publisher(for: UIDevice.orientationDidChangeNotification)) { _ in                     if let windowScene = UIApplication.shared.connectedScenes.first as? UIWindowScene,                        let orientation = windowScene.windows.first?.windowScene?.interfaceOrientation {                         deviceOrientation = orientation                         Task {                             do {                                 try await recorder.updateOrientation(interfaceOrientation: deviceOrientation)                             } catch {                                 throw Errors.UnableToUpdateOrientation                             }                         }                     }                 } Here is the full repo: https://github.com/aabagdi/MemoMan/tree/MemoManStereo Thanks for any leads!

Hello, I'm having some difficulties trying to customise a SwiftUI list-detail splitview using List and OutlineGroup: The model used is provided in Apple documentation OutlineGroup. The contentView is struct ContentView: View { @State var itemString = String() var body: some View { HSplitView { MyOutLine(title: "MyOutLine", itemString: $itemString) .frame(width: 200, height: 300 , alignment: Alignment(horizontal: .leading, vertical: .top)) .padding() MyView(itemString: itemString) } } } The left view is struct MyOutLine: View { let title:String @Binding var itemString:String @State private var selection: FileItem? var body: some View { List(selection: $selection) { OutlineGroup(data, children: \.children) { item in Text ("\(item.description)") .onTapGesture { selection = item itemString = item.description } .listRowBackground( selection == item ? Color.gray :nil ) } } .listStyle(.sidebar) .onAppear { itemString = "No selection"} } } The right view is: struct MyView: View { let itemString:String var body: some View { VStack{ Spacer() HStack { Spacer() Text(itemString) Spacer() } Spacer() } } } The result works but I have 2 problems: The selection works but the detail view is updated only when I click the text but not when I click the rest of the row. This results in the detail view not being sync with the list selection. I would like to customise the colour of the selected row but listRowBackground does not seem to work. Is there a way to fix this Thank you in advance Jean Marie

I'm working on creating a tiny app that copies a random sampling of files from a source folder to a destination folder: https://github.com/belovachap/Select-Random-Files-Mac I choose folders in my user's Documents folder, am able to get the random sampling of files but then run into permission errors when trying to copy to the destination folder. I've tried adding a call to startAccessingSecurityScopedResource on the destination URL but it doesn't seem to help. Is this having the same problems on anyone else's computer??

Hi, I learned swift only a few weeks ago, and im trying to make a TabView in Xcode. But, it shows only one item! I've already made this work in other apps, but I can't get it working here! import SwiftUI struct tabs: View { var body: some View { TabView { ContentView() .tabItem { Image(systemName: "house.circle.fill") Text("Home") Settngs() .tabItem { Image(systemName:"gear.circle.fill") Text("Settings") } } } } } #Preview { tabs() } and also, I checked "settngs()" and its my name

Please consider simple example below. I am trying to put a timer in the upper right corner of a live activity. I am done, it works, but I'm trying to get the timer to look better. If I take a regular text, I can get it to align properly by adjusting the .frame(), , but for a text with a timer inside it, alignment is ignored from what I can see. Text("Hello").frame(width: 90, alignment: .trailing).border(.red) /*Text(timerInterval: timeRange, countsDown: false) .monospacedDigit().font(.subheadline).frame(width: 90, alignment: .trailing).border(.red)*/ } Is there any way to fix this? Right now, I have a fixed width so that HH:mm:ss will fit, but that doesn't look super great if it's just minutes and seconds for example, there's an empty block to the right

Basically, in my widget/live activity, I want to extract reusable views into a separate file with an isolated view and preview. Dummy example below. I cannot do it because it says "missing previewcontext". The only way I've found is to add the view to my main app target, but I don't want to clutter my main app wiews that only exist in my widgets if I can avoid it. Can this be done somehow? Thoughts appreciated. Dummy example (tried with and without "previewLayout": struct StatusActivityView: View { let status: UserStatusData var body: some View { VStack(alignment: .center) { Text("Dummy example") }.background(.blue).padding(5) } } @available(iOS 16.2, *) struct StatusActivityView_Previews: PreviewProvider { static var previews: some View { let status = WidgetConstants.defaultEntry() return StatusActivityView(status: status).previewLayout(.sizeThatFits) } }

I have a SwiftUI page that I want to simplify by showing basic information by default, and putting the additional info behind a "Details" DisclosureGroup for advanced users. I started by laying out all the components and breaking things into individual Views. These all are laid out and look fine. Then I took several of them and added them inside a DisclosureGroupView. But all of a sudden, the views inside started getting crunched together and the contents of the DisclosureGroup got clipped about 2/3 of the way down the page. The problem I'm trying to solve is how to show everything inside the DIsclosureGroup. The top-level View looks like this: VStack { FirstItemView() SecondView() DetailView() // <- Shows disclosure arrow } Where DetailView is: struct DetailView: View { @State var isExpanded = true var body: some View { GeometryReader { geometry in DisclosureGroup("Details", isExpanded: $isExpanded) { ThirdRowView() Spacer() FourthRowView() VStack { FifthRowWithChartView() CaptionLabelView(label: "Third", iconName: "chart.bar.xaxis") } } } } } The FifthRowWithChartView is half-clipped. One thing that might contribute is that there is a Chart view at the bottom of this page. I've tried setting the width and height of the DisclosureGroup based on the height returned by the GeometryReader, but that didn't do anything. This is all on iOS 17.6, testing on an iPhone 15ProMax. Any tips or tricks are most appreciated.

Having a traditional 'NavigationSplitView' setup, I am looking for a way to animate it the same as the sidebarView, where there is a button to toggle and it animates by sliding out from the right side of the view, however the closest I have gotten was manipulating the 'navigationSplitViewColumnWidth' but that always results in the view instantly appearing / disappearing. I am using SwiftUI for a MacOS specific app. Here is just a general idea of what I am currently doing, it is by no means a reflection of my real code but serves the purpose of this example. struct ContentView: View { @State private var columnWidth: CGFloat = 300 var body: some View { NavigationSplitView { List { NavigationLink(destination: DetailView(item: "Item 1")) { Text("Item 1") } NavigationLink(destination: DetailView(item: "Item 2")) { Text("Item 2") } NavigationLink(destination: DetailView(item: "Item 3")) { Text("Item 3") } } .navigationTitle("Items") } detail: { VStack { DetailView(item: "Select an item") Button(action: toggleColumnWidth) { Text(columnWidth == 300 ? "Collapse" : "Expand") } .padding() } } .navigationSplitViewColumnWidth(columnWidth) } private func toggleColumnWidth() { withAnimation { columnWidth = columnWidth == 300 ? 0 : 300 } } } struct DetailView: View { var item: String var body: some View { Text("Detail view for \(item)") .navigationTitle(item) .padding() } } @main struct MyApp: App { var body: some Scene { WindowGroup { ContentView() } } }

For whatever reason SwiftUI sheets don't seem to be resizable anymore. The exact same code/project produces resizable Sheets in XCode 15.4 but unresizable ones with Swift included in Xcode 16 beta 2. Tried explicitly providing .fixedSize(horizontal false, vertical: false) everywhere humanly possible hoping for a fix but sheets are still stuck at an awkward size (turns out be the minWidth/minHeight if I provide in .frame).

The SwiftData predicate documentation says that it supports the contains(where:) sequence operation in addition to the contains(_:) string comparison but when I put them together in a predicate to try and perform a tokenised search I get a runtime error. Unsupported subquery collection expression type (NSInvalidArgumentException) I need to be able to search for items that contain at least one of the search tokens, this functionality is critical to my app. Any suggestions are appreciated. Also does anyone with experience with CoreData know if this is possible to do in CoreData with NSPredicate? import SwiftData @Model final class Item { var textString: String = "" init() {} } func search(tokens: Set<String>, context: ModelContext) throws -> [Item] { let predicate: Predicate<Item> = #Predicate { item in tokens.contains { token in item.textString.contains(token) } } let descriptor = FetchDescriptor(predicate: predicate) return try context.fetch(descriptor) }

When Swiftui Self._printChanges() prints StructName: @self changed. How do I determine why self changed?

When Swiftui Self._printChanges() prints StructName: @40 changed. what does the 40 represent ?

Overview I've found inconsistency on view lifecycle events between UIKit and SwiftUI as the following shows when using UIVPageViewController and UIHostingController as one of its pages. SwiftUI View onAppear is only called at the first time to display and never called in the other cases. UIViewController viewDidAppear is not called at the first time to display, but it's called when the page view controller changes its page displayed. The whole view structure is as follows: UIViewController (root) UIPageViewController (as its container view) UIHostingController (as its page) SwiftUI View (as its content view) UIViewControllerRepresentable (as a part of its body) UIViewController (as its content) Environment Xcode Version 15.4 (15F31d) iPhone 15 Pro (iOS 17.5) (Simulator) iPhone 8 (iOS 15.0) (Simulator) Sample code import UIKit import SwiftUI class ViewController: UIViewController, UIPageViewControllerDelegate, UIPageViewControllerDataSource { private var pageViewController: UIPageViewController! private var viewControllers: [UIViewController] = [] override func viewDidLoad() { super.viewDidLoad() setup() } private func setup() { pageViewController.delegate = self pageViewController.dataSource = self let page1 = UIHostingController(rootView: MainPageView()) let page2 = UIViewController() page2.view.backgroundColor = .systemBlue let page3 = UIViewController() page3.view.backgroundColor = .systemGreen viewControllers = [page1, page2, page3] pageViewController.setViewControllers([page1], direction: .forward, animated: false) } override func prepare(for segue: UIStoryboardSegue, sender: Any?) { super.prepare(for: segue, sender: sender) guard let pageViewController = segue.destination as? UIPageViewController else { return } self.pageViewController = pageViewController } func pageViewController(_ pageViewController: UIPageViewController, didFinishAnimating finished: Bool, previousViewControllers: [UIViewController], transitionCompleted completed: Bool) { print("debug: \(#function)") } func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? { print("debug: \(#function)") guard let viewControllerIndex = viewControllers.firstIndex(of: viewController) else { return nil } let previousIndex = viewControllerIndex - 1 guard previousIndex >= 0, viewControllers.count > previousIndex else { return nil } return viewControllers[previousIndex] } func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? { print("debug: \(#function)") guard let viewControllerIndex = viewControllers.firstIndex(of: viewController) else { return nil } let nextIndex = viewControllerIndex + 1 guard viewControllers.count != nextIndex, viewControllers.count > nextIndex else { return nil } return viewControllers[nextIndex] } } struct MainPageView: View { var body: some View { VStack(spacing: 0) { PageContentView() PageFooterView() } .onAppear { print("debug: \(type(of: Self.self)) onAppear") } .onDisappear { print("debug: \(type(of: Self.self)) onDisappear") } } } struct PageFooterView: View { var body: some View { Text("PageFooterView") .padding() .frame(maxWidth: .infinity) .background(Color.blue) .onAppear { print("debug: \(type(of: Self.self)) onAppear") } .onDisappear { print("debug: \(type(of: Self.self)) onDisappear") } } } struct PageContentView: UIViewControllerRepresentable { func makeUIViewController(context: Context) -> some UIViewController { PageContentViewController() } func updateUIViewController(_ uiViewController: UIViewControllerType, context: Context) {} } class PageContentViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() setup() } private func setup() { view.backgroundColor = .systemYellow let label = UILabel() label.text = "PageContentViewController" label.font = .preferredFont(forTextStyle: .title1) view.addSubview(label) label.translatesAutoresizingMaskIntoConstraints = false NSLayoutConstraint.activate([ label.centerXAnchor.constraint(equalTo: view.centerXAnchor), label.centerYAnchor.constraint(equalTo: view.centerYAnchor) ]) } override func viewDidAppear(_ animated: Bool) { super.viewDidAppear(animated) print("debug: \(type(of: Self.self)) \(#function)") } override func viewDidDisappear(_ animated: Bool) { super.viewDidDisappear(animated) print("debug: \(type(of: Self.self)) \(#function)") } } Logs // Display the views debug: MainPageView.Type onAppear debug: PageFooterView.Type onAppear // Swipe to the next page debug: pageViewController(_:viewControllerAfter:) debug: pageViewController(_:viewControllerBefore:) debug: PageContentViewController.Type viewDidDisappear(_:) debug: pageViewController(_:didFinishAnimating:previousViewControllers:transitionCompleted:) debug: pageViewController(_:viewControllerAfter:) // Swipe to the previous page debug: PageContentViewController.Type viewDidAppear(_:) debug: pageViewController(_:didFinishAnimating:previousViewControllers:transitionCompleted:) debug: pageViewController(_:viewControllerBefore:) As you can see here, onAppear is only called at the first time to display but never called in the other cases while viewDidAppear is the other way around.

I'm developing an app where a user can bring a video or content from a WKWebView into an immersive space using SwiftUI attachments on a RealityView. This works just fine, but I'm having some trouble configuring how the audio from the web content should sound in an immersive space. When in windowed mode, content playing sounds just fine and very natural. The spatial audio effect with head tracking is pronounced and adds depth to content with multichannel or Dolby Atmos audio. When I move the same web view into an immersive space however, the audio becomes excessively echoey, as if a large amount of reverb has been put onto the audio. The spatial audio effect is also decreased, and while still there, is no where near as immersive. I've tried the following: Setting all entities in my space to use channel audio, including the web view attachment. for entity in content.entities { entity.channelAudio = ChannelAudioComponent() entity.ambientAudio = nil entity.spatialAudio = nil } Changing the AVAudioSessionSpatialExperience: And I've also tried every soundstage size and anchoring strategy, large works the best, but doesn't remove that reverb. let experience = AVAudioSessionSpatialExperience.headTracked( soundStageSize: .large, anchoringStrategy: .automatic ) try? AVAudioSession.sharedInstance().setIntendedSpatialExperience(experience) I'm also aware of ReverbComponent in visionOS 2 (which I haven't updated to just yet), but ideally I need a way to configure this for visionOS 1 users too. Am I missing something? Surely there's a way for developers to stop the system messing with the audio and applying these effects? A few of my users have complained that the audio sounds considerably worse in my cinema immersive space compared to in a window.

What is the info property of SwiftUI::Layer? I couldn't find any document or resource about it. It appears in SwiftUI::Layer's definition: struct Layer { metal::texture2d<half> tex; float2 info[5]; /// Samples the layer at `p`, in user-space coordinates, /// interpolating linearly between pixel values. Returns an RGBA /// pixel value, with color components premultipled by alpha (i.e. /// [R*A, G*A, B*A, A]), in the layer's working color space. half4 sample(float2 p) const { p = metal::fma(p.x, info[0], metal::fma(p.y, info[1], info[2])); p = metal::clamp(p, info[3], info[4]); return tex.sample(metal::sampler(metal::filter::linear), p); } };